everyone will have there own opinions on which parts to use, i currently doing a st170 conversion in my mk1 popular plus and using the 6 speed box, as im using the six speed the inner leg doesnt need cutting but custom driveshafts have to be made up, crazycage off here is helping me considerably with the whole build/converson and it will be his mounts and drive shafts I will be using. Look in the resto room for st170 mk1 popular plus (freddy) thats my build to keep up to date with what im doing if thats of any use mate